Sylvania



c. L. PIERCE, 1R. INSULATOR SUPPORTING FIXTURE. APPLICATION FILED APR.6. I9I6.

m W w N VIEZZTZGSSGSI 1,193,602. I i Application filed April 6, 1916.Serial Ne..89,369.

-UNITED sra'rns PAT CHARLES L. PEIRCE, JR., OF PITTSBURGH, YENNSYLVANIA,ASSIGNOR OF ONE-HALF FFEQE.

TO HUBBARD 00., OF PITTSBURGH, PENNSYLVANIA, A. CORPORATION OF PENN-SYLVANIA.

INSULATOR-SUPPORTING FIXTURE.

To kill uiltom it mag concern:

Be 'it .known that I, CI{ARLES L. PEIRCE,

Jr., a citizen of the United States, and a resident of Pittsburgh, inthe county of Allegheny and State of Pennsylvania, have invented certainnew and useful Improveinents in Insulator-Supporting Fixtures, of whichthe followin is aspecification.

My invention re ates to supporting fixtures, particularly to fixturescomprising a sheet metal body part and sheet 'metal bracket memberssecured thereto.

Supporting fixtures have been made heretofore in which the'body part andbracket members are made of stock material as for example channel bars."In my Patent No. 1,007,138, issued October 31, 1911, particularlyFigures 9 and 10,'is shown a fixture in which the body .is a length :ofchannel barand -'t-he"bra'cket member is bent up from a' length ofchannel bar of greater width than the in 'order to saddle over the body.with its "sides overlapping the body sides, a strap --saddling over thebracket member and -a single rivet securing the strap, bracket memberand body together,

. the strap having lateral ears provided with liced.

bolt holes forsecuring the fixture to a sup- "-.port. One disadvantagein the fixture of 'this'patent is that the stock material is of fixeddimensions and has the same crosssection throughout whereas the strainsto wlnch'the members are sub1eeted in service are. digerent at varioussections. This means that n order to get the necessary strength at onesection to meet-a certain 'strain there will be over-weight at someother section where-the strain is not so great and consequently therewill be'waste. Another disadvantage is thatthe bracket members will notfit intimately to the body or the reason that the outer corners of thechannel bars are right angular and quite sharp whereas the inner cornersare obtuse angular and rounded, the result being that when the bracketmembers saddle over the body part the overlapping sides will not engagesnugly, this being clearly shown in 10, and consequently considera lestrengthening inter-eugagernent is sacri- Another lisa lrautage is that.the strap. in order to lit'suuglr again t the to and sides ol thebrzu'zhet member must be bent sharply. and if after making llw sharpbonds the Initial is not prop rly zuuurihil Specification of LettersPatent.

the strap will be. weak at the bend and frequently breaka'ges haveoccurred for this reason. i

The object of my invention is" to produce a fixture in whi'eh'all theabove'disadvanfee ta'ges are overcome and eliminated and in the bodypart and bracket members integral from sheet metal 'to, archedcross-section with well rounded corners, the curvature being such that"the-bracket member will intimately saddle -o."erandzengage with the bodypart and the strap will intimately saddle over andengage' with the topand sides of the bracket member, -.the bends of' the strap between itsbody and ears being well rounded and preferably-provided with lateralstrengtheningcorrugations.

Onthe accompanying drawing I have shown an insulator supporting fixturewhich embodies theconstrnetion and .-featiires of my invention. I

On this drawing Fig. 1 is aside elevational view, Fig. 2 is a front viewwith the end of the lower bracketmember broken away, Fig. 3 is asectional view on plane 33, Fig.2, Fig. 4 is a sectional view on planeM, Fig. 2,-and Fig. 5 is asectional view similar to Fig. 4 showing amodified arrangement. 3

In the fixture shown the body part lOeis bent up from a single piece offiat sheet metal to arched or U-shapedcross-section, the front beingpractically semi-cylindrical. ;\t the top and bottom the body has theflattened sections '11v and 12 provided with the. belt or screw holes 13and l I'CSPCCI metal wilhits bark amlhend pails l? and,

l3 ul :u'rln w. U shaped ('r s -seriiou and with the limbslil'flllgI-li. lug'xtllil' at the will 19 (0 f rm a seat lur aninsulator support in slrurturr i shown in {his as-e in (he. forurul wirhelix n: g :xl ils' ends in the upper and lower slots 21 and 22respectively. The backs 17 of the bracket members saddle over andintimately lit the front and sides of the body part 10 clearly shown inFigs. 3 and 4, and such engagement locks the bracket members to the bodypart against rotational displacen'ient, the bracket members beingfurther secured to the body part by the rivets 23.

To provide greater and more secure seating for the fixture a strap 24 isapplied over the back of each bracket member. These straps are alsopressed up from sheet metal and each has the central body portion of larch or U-shaped cross-section for intimately saddling over and engagingwith the front and sides of the bracket member back,

'Wings 25 and 26 extending laterally from the body of the strapproviding the seating area for the fixture and having the bolt holes 27and 28 by means of which the straps may be secured to a support. Eachstrap is preferably secured in place by the same rivet 23 which holdsthe bracket member to the body part. In other words, a single rivetpasses through the strap, bracket member and body part as clearly shownin Figs. 3 and 4.

:The bends 29 and 30 between the wings and body of the strap are roundedand to add strength corrugations 31 and 32 may be formed in the bendslongitudinally of the strap.

VViththe above construction and arrangement the bracket membersintimately saddle over and engage with the-front and sides of the bodypart 10 and the straps inti mately saddle over and engage with the frontand sides of the bracket members and such intimate engagement addsgreat' strength to the structure and such engagement together with therivets. 23 will resist any displacement, either rotational -orlongitudinal, of the parts. The bends in the strap being of considerableradius, the strap will retain full strength and when the straps areprovided with the strengthening corrugations the fixture will be rigidlysecured to its support particularly against swing or displacement underlateral strains under pull of wires at the insulator ends of the bracketmembers.

Tn Fig. 5 I have shown my invention applied to an individual bracket tobe secured construction and arrangements shown and described as changesand modifications are no doubt possible which would still come withinthe scope of the invention.

1 claim the following:

1. A fixture comprising an insulator receiving member and a strap forsecuring said member to a support, said member being pressed from flatsheet metal and being of arch shaped cross section open to the rear,said strap being arched to saddle over and intimately engage at allpoints with the front and sides of said member, means securing the strapto the member, and laterally extending wings on said strap providedwithbelt holes.

2. A fixture comprising an insulator receiving member and a strap forsecuring said member to a support, said member being pressed from fiatsheet metal and being of arch shaped cross section open to the rear,said strap being arched to saddle over and intimately engage at allpoints with the front and sides of said member, means securing the strapto the member, laterally extending wings on said strap provided withbelt holes, and transversely extending strengthening corrugations forthe bends between the arch and wings of said strap.

3. An insulator supporting fixture comprising a body part anda bracketmember, said body part being pressed up from sheet metal to archedcross-section. and open at the rear, said bracket member being pressedup from sheet metal to arched transverse cross-section, the end ofsaid'bracket member saddling over and intimately engaging with the frontand sides of the body part to be locked against rotational displacement,and means securing the bracket member to the body' partagainstlongitudinal displace ment.

4. An insulator supporting fixture comprising a body part and a bracketmember, said body part being pressed up from flat sheet metal to archedtransverse cross-section and open to the rear, said bracket member beingpressed up from flat sheet metal to arched transverse cross-section, theend of said bracket member saddling over and intimately engaging at allpoints with the.

front and sides of'said arched body part, a ,strap pressed up from sheetmetal and arched at its center to saddle over and intimately engage Withthe front and sides of the bracket member, means securing the strap,bracket member and body part intimately together, and lateral Wings onsaid strap provided with bolt holes;

5. An insulator supporting fixture comprising a body part and a bracketmember, said body part being pressed up from flat sheet metal to archedtransverse cross-section and open to the rear, said bracket memher beingpressed up {mm flatsheet mom to arched tmnsveyse (wuss #ev'imu the end)1 said bracket member snd'iihkg user and intimately engaging at ahpuints with the front and sides 01'' said arched body part, :1, strappressed up from sheet metal and arched at its center to saddle over andintv mately engage with the front and sides of the bracket member, meanssecuring the 10 strap, bracket memher and body part inti mutelytogether, and lateral Wings 011 said strap provided With halt holes,said strap having strengthening corrugations at its hemle between Itsarched section and the wings.

In witness whereof I hereunto subscribe my name this 26th day ofFebruary, A. D., 1916.

CHARLES L. PEIRCE, JR.

